﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEngine;

namespace OhioState.Tiling
{
    class OriginalPerlin : MonoBehaviour
    {
        public int[] perm;

        public int[,] grad;
        public void Start()
        {
            grad = new int[16,3]{{0,1,1},{0,1,-1},{0,-1,1},{0,-1,-1},
                   {1,0,1},{1,0,-1},{-1,0,1},{-1,0,-1},
                   {1,1,0},{1,-1,0},{-1,1,0},{-1,-1,0}, // 12 cube edges
                   {1,0,-1},{-1,0,-1},{0,-1,1},{0,1,1}}; // 4 more to make 16
            perm = new int[]{ 151,160,137,91,90,15,
          131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,
          190, 6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,
          88,237,149,56,87,174,20,125,136,171,168, 68,175,74,165,71,134,139,48,27,166,
          77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,
          102,143,54, 65,25,63,161, 1,216,80,73,209,76,132,187,208, 89,18,169,200,196,
          135,130,116,188,159,86,164,100,109,198,173,186, 3,64,52,217,226,250,124,123,
          5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,
          223,183,170,213,119,248,152, 2,44,154,163, 70,221,153,101,155,167, 43,172,9,
          129,22,39,253, 19,98,108,110,79,113,224,232,178,185, 112,104,218,246,97,228,
          251,34,242,193,238,210,144,12,191,179,162,241, 81,51,145,235,249,14,239,107,
          49,192,214, 31,181,199,106,157,184, 84,204,176,115,121,50,45,127, 4,150,254,
          138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180};

            permTexture = new Texture2D(256, 1);
            permTexture.filterMode = FilterMode.Point;
            permTexture.wrapMode = TextureWrapMode.Repeat;
            for (int i = 0; i < 256; i++)
            {
                Color c = new Color((float)perm[i]/256.0f,0.0f,0.0f);
                //Color c
                permTexture.SetPixel(i, 0, c);
               
            }
            permTexture.Apply();
            gradTexture = new Texture2D(16, 2);
            gradTexture.filterMode = FilterMode.Point;
            gradTexture.wrapMode = TextureWrapMode.Repeat;
            for (int i = 0; i < 16; i++)
            {
                Color c = new Color(0.5f * (grad[i, 0] + 1.0f), 0.5f * (grad[i, 1] + 1.0f), 0.5f * (grad[i, 2] + 1.0f));
                gradTexture.SetPixel(i, 0, c);
                gradTexture.SetPixel(i, 1, c);
            }
            gradTexture.Apply();
            Material perlinMaterial = transform.GetComponent<Renderer>().material;
            perlinMaterial.SetTexture("permSampler", permTexture);
            perlinMaterial.SetTexture("gradSampler", gradTexture);
        }
        public void Update()
        {
            
        }
        private PerlinNoiseTileSet tileSet;
        private Texture2D permTexture;
        private Texture2D gradTexture;
       

    }
}
